US20190187828A1 - Location detection for a touch system - Google Patents
Location detection for a touch system Download PDFInfo
- Publication number
- US20190187828A1 US20190187828A1 US15/843,661 US201715843661A US2019187828A1 US 20190187828 A1 US20190187828 A1 US 20190187828A1 US 201715843661 A US201715843661 A US 201715843661A US 2019187828 A1 US2019187828 A1 US 2019187828A1
- Authority
- US
- United States
- Prior art keywords
- touch
- columns
- rows
- touch system
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
Definitions
- This relates generally to integrated circuits, and more particularly to estimating a touch location in a touch system.
- a touch system includes interfaces such as touch screens that can include an input device and output device layered on top of an electronic visual display of an information processing system. For example, a user can provide input or control the information processing system through simple or multi-touch gestures by touching the screen with a special stylus and/or one or more fingers.
- Touch screens are common in devices, such as game consoles, personal computers, tablet computers, electronic voting machines, and smart phones. These interfaces can also be attached to computers or, as terminals, to networks.
- An example capacitive touch screen panel consists of an insulator such as glass, coated with a transparent conductor such as indium tin oxide. As the human body is also an electrical conductor, touching the surface of the screen results in a distortion of the screen's electrostatic field, measurable as a change in capacitance.
- Different technologies may be used to determine the location of the touch. In some touch systems, mutual or self capacitance can be measured by transmitting a signal on a row/column of the touch screen interface and receiving the signal on a respective column/row. When the touch occurs close to a row/column intersection, the received change in signal strength and/or signal phase changes. This change isolates the touch location.
- a system in an example, includes a receiver to receive output signals from a touch system to detect a user's touch. The output signals are received in response to excitation signals that are generated out of phase with respect to each other and applied to at least two rows or columns of the touch system.
- a touch location analyzer compares an amplitude of the output signals received from the rows or columns of the touch system, where a ratio of the output signal amplitudes from the rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system.
- a receiver receives output signals from a touch system to detect a user's touch.
- the output signals are received in response to at least two out of phase excitation signals applied to at least two rows or columns of the touch system.
- a touch location analyzer compares the phase of the output signals received from different rows or columns of the touch system. A difference in phase of the output signal amplitudes from the rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system.
- a method in yet another example, includes transmitting excitation signals that are out of phase with respect to each other to a touch system. At least one of the excitation signals is transmitted to at least one row or column of the touch system and at least one other of the excitation signals is concurrently transmitted to at least one other row or column of the touch system. The method includes receiving output signals from the touch system in response to the excitation signals. The output signal includes a combined response from two or more rows or columns of the touch system excited by the excitation signals.
- the method includes comparing the amplitude or phase of the output signals received from different rows or columns of the touch system to determine a difference in the amplitude or phase of the output signal from the different rows or columns of the touch system to determine the location of the user's touch relative to the rows or columns of the touch system.
- FIG. 1 is a schematic block diagram of an example system to determine touch location of a touch system.
- FIG. 2 is a circuit diagram of a receiver and transmitter for an example touch system that uses multiphase signaling and processing.
- FIG. 3 is a circuit diagram of an example touch system that can be excited and analyzed via multiphase signaling to determine touch location.
- FIG. 4 is a circuit diagram of an example transmitter and receiver circuit that uses multiphase signaling and processing to determine touch location.
- FIG. 5 is a flow diagram of an example method to determine touch location of a touch system.
- received signals from a touch system are analyzed with respect to signal amplitude and/or phase to determine a location of a user's touch relative to the rows or columns of the touch system.
- a receiver receives output signals (or signal) from the touch system to detect the user's touch.
- the output signals are received in response to excitation signals that are generated out of phase with respect to each other and applied to at least two rows or columns of the touch system.
- out of phase excitation signals can be applied concurrently to the rows or columns of the touch system to decrease the amount of scan time it takes to receive a response to the excitation signals.
- receiving hardware to determine the user's touch can be simplified.
- a touch location analyzer compares an amplitude of the output signals received from different rows or columns of the touch system.
- a ratio of the output signal amplitudes from the different rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system.
- received signal phases from different rows or columns of the touch system are analyzed to determine the location of the user's touch.
- precise location of the touch can be determined which includes determining touch locations between rows and/or columns of the touch system. For example, if a stylus (or finger) is placed at a touch location that is directly over a row/column detection point, a maximum signal amplitude may be received for that point. If the stylus is offset to touch/affect more than one row or column detection point of the touch system, a combination of signal amplitudes or phases can be analyzed to detect locations between rows or columns. Thus, if one row yields a signal at 70% of maximum, and another row provides a signal that is 30% of maximum, it can be determined that the stylus is offset from the center of one row in the direction toward about 30% of the other row.
- the touch system can be excited by a transmitter that transmits excitation signals that are out of phase with respect to each other (e.g., a sine wave generated as one excitation signal and a cosine wave generated as another excitation signal). At least one of the of excitation signals is transmitted to at least one row or column of a touch system and at least one other of the excitation signals is concurrently transmitted to at least one other row or column of the touch system. An output signal having a combination of signals from each of the excitation signals is received by a receiver in response to the excitation signals transmitted to the touch system. Receiver circuits extrapolate the row or column information from the output signal based on the phase of the excitation signals. For example, in a two phase excitation system, at least two receiver circuits include a summing junction to extrapolate signal phases from the output signal to determine which of at least two rows or columns was touched.
- FIG. 1 illustrates an example system 100 to touch location of a touch system.
- the system 100 includes a transmitter 110 to transmit excitation signals 114 .
- At least one of the excitation signals 114 can be transmitted to at least one row or column of a touch system 120 and at least one other of the excitation signals can be concurrently transmitted to at least one other row or column of the touch system.
- individual excitation can be provided where one row or column is excited and in a subsequent scanning sequence another row or column of the touch system 120 .
- the transmitter 110 generates at least one of the excitation signals 114 at a given phase to one row or column of the touch system 120 and generates the other of the excitation signals at a different phase from the given phase to the other row or column of the touch system.
- one excitation signal 114 may be generated as a sin wave and another excitation signal generated as a cosine wave. As described hereinbelow, other phase relationships are possible.
- the transmitter 110 includes at least one alternating current (AC) source 130 to generate the excitation signals 114 to the touch system 120 where each of the excitation signals in one example are transmitted out of phase with respect to each other excitation signal.
- AC alternating current
- At least two of the excitation signals 114 can be generated at the same frequency or at different frequencies with respect to each other via the AC source 130 . Different frequencies can be employed for the excitation signals 114 so long as they remain in their given phase relationship (e.g., orthogonal) over the integration time which includes both the time it takes to transmit and receive signals in response to the excitation signals 114 .
- At least two of the excitation signals 114 can be transmitted to at least two rows or columns of the touch system 120 where the excitation signals are at least 90 degrees out of phase with respect to each other when transmitted to the respective rows or columns.
- more than two excitation signals 114 can be transmitted to the touch system to further reduce scan time of the touch system.
- scan time refers to the amount of time it takes to excite each respective row or column of the touch system 120 .
- each row or column had to be excited individually to detect the presence of a touch shown as user input 134 .
- multiple rows or columns can be analyzed concurrently to reduce the scan time in half in a two phase excitation system (or reduced more if more than two excitation signals utilized).
- the touch system 120 can be a mutual capacitance touch system (see e.g., FIG. 3 ) having at least two rows and columns that receive the excitation signals 114 from the transmitter 110 where the touch system generates an output signal 140 (or signals) based on the excitation signals.
- a receiver 150 receives the output signal 140 from the touch system 120 .
- the receiver 150 includes at least two receiver circuits 160 to process the output signal 140 from the touch system 120 and to determine if or where a user has touched the touch system.
- the term “circuit” can include a collection of active and/or passive elements that perform a circuit function, such as an analog circuit or control circuit. Additionally or alternatively, for example, the term “circuit” can include an integrated circuit (IC) where all and/or some of the circuit elements are fabricated on a common substrate (e.g., semiconductor substrate).
- IC integrated circuit
- Each of the receiver circuits 160 can include a summing junction (see e.g., FIG. 4 ) to extrapolate signal phases 170 from the output signal 140 to determine which of the rows or columns was touched from the touch system 120 .
- the output signal 140 is summed with the excitation signal at the given phase to extrapolate the row or column excited in response to the given phase.
- the output signal 140 is summed with the excitation signal at the different phase to extrapolate the row or column excited in response to the different phase.
- the output of each of the summing junctions can be filtered via a low pass filter to facilitate extrapolating the row or column that was touched from the output of each of the summing junctions in the receiver circuit 160 .
- a portion of the touch system 120 can be excited by the transmitter 110 during one scanning sequence and analyzed by the receiver 150 based on the scanning of the portion. At least one other portion of the touch system 120 can be excited by the transmitter 110 during another scanning sequence and analyzed by the receiver based on the scanning of the at least one other portion.
- hardware complexity can be reduced because multiple rows or columns can be scanned using fewer connection nodes to the touch system 120 to determine a touch to the system (e.g., in a two phase excitation system, half of the row or column connections from conventional systems can be reduced).
- a touch location analyzer 180 compares an amplitude of the output signals received from different rows or columns of the touch system.
- a ratio of the output signal amplitudes from the different rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system. For example, if the amplitude received from one row was at 20% peak and the amplitude received from another row was at 80% peak, touch location can be calculated base on the ratio of 20/80, such that 80 percent of the users touch force is affecting one row and 20% of the user's touch force is affecting the other row.
- peak signal amplitude refers to the maximum signal received when no touch force is applied. If it is known that 10 millimeters separate the rows for example, the touch location is approximately 8 millimeters away from one row (the 20% peak row) and about two millimeters away from the other row (e.g., 80% peak row).
- received signal phases from different rows or columns of the touch system are analyzed to determine the location of the user's touch.
- received output signals may be 90 degrees out of phase with respect to one another.
- the signal phases of the output signal 140 can change such that it can be determined where in between rows or columns the touch has occurred.
- a calibration table described below, can be provided where signal amplitudes and phases are analyzed between maximum touch force and minimum touch force to determine the change in location. The table can include a range of amplitude or phase differences corresponding to how close or near a touch has occurred to a given row or column.
- precise location of the touch can be determined which includes determining touch locations between rows and/or columns of the touch system. For example, if a stylus (or finger) is placed at a touch location that is directly over a row/column detection point, a maximum signal amplitude may be received for that point. If the stylus is offset to touch/affect more than one row or column detection point of the touch system, a combination of signal amplitudes or phases can be analyzed to detect locations between rows or columns.
- a signal amplitude example if one row yields a signal amplitude at 50% of maximum, and another row provides a signal that is 50% of maximum, it can be determined from this ratio that the stylus is offset approximately half way between the two rows.
- a similar analysis can be conducted by the touch location analyzer 180 by comparing signal amplitudes received from respective columns to determine touch locations between columns.
- a signal phase example for determining touch location if a touch location is directly over a row/or column detection point, a given phase may be determined between the respective row or column. If the stylus (or finger) is moved between rows or columns a different phase relationship can be determined.
- a calibration table in the touch location analyzer 180 can be used to determine a range of amplitudes or phases to be encountered at differing distances between rows or columns of the touch system 120 . For example, if a stylus is 100% over a given row of the touch system 120 , a phase of 90 degrees may be detected between the two rows. If the stylus is between rows or columns, a phase other than 90 degrees may be detected where this difference in phase from 90 degrees determines the distance between rows or columns.
- FIG. 2 illustrates an example circuit 200 of a receiver 210 and a transmitter 220 for a touch system where multiphase excitation and processing is employed.
- the transmitter 220 provides multiple out of phase excitation signals 234 to a touch panel 240 .
- the transmitter 220 can provide row or column excitation to the touch panel 240 to detect a user's touch where more than one row or column are excited concurrently via the excitation signals 234 .
- a capacitance touch panel 240 is illustrated. In a touch system, mutual or self capacitance can be measured by transmitting the excitation signals 234 to selected rows/columns of the panel 240 .
- the receiver 210 receives a signal 244 in response to the excitation signals 234 applied on the columns/rows of the touch panel 240 .
- the received change in signal strength and/or phase change can be detected by the receiver 210 . This change isolates the touch location on the touch panel 240 .
- the transmitter 220 can include at least one numerically controlled oscillator (NCO) 250 which drives a digital to analog converter (DAC) 254 , which in turn drives an output amplifier 258 to provide the signals 234 .
- the receiver 210 can include an analog front end 259 that includes an input stage or amplifier 260 which drives an analog to digital converter (ADC) 262 . Output from the ADC 262 and NCO 264 can be multiplied at 266 which is then summed at 268 .
- the receiver 210 can include summing junctions and filters (e.g., before or after the sense amplifier 260 ) to extrapolate row/column information from the signal 244 as described herein.
- FIG. 3 illustrates an example of a touch system 300 that can be excited and analyzed via multiphase signaling.
- a known signal is transmitted via sources which is coupled through a touch panel 320 and then received by the receiver via sense inputs 330 .
- the change in the gain/phase of the received signal from one or more of the sense inputs 330 indicates the presence or absence of a touch.
- each transmitter row/drive line
- the received signal is concurrently measured by a number of receive channels via inputs 330 .
- the change in capacitance on any receive channel indicates the presence of a touch close to the intersection of the transmit channel (row) and that receive channel (column).
- the transmit channels are then scanned row by row to obtain the touch image.
- a location analyzer 334 can be provided to detect a location for a user's touch via stylus or fingering.
- the location analyzer 334 can include an amplitude comparator 340 to compare signal amplitudes between rows or columns to determine a signal amplitude ratio which determines touch distances between rows and/or columns.
- a phase comparator 350 can also be provided to determine touch distances between rows and/or columns based on differences in detected signal phases received.
- FIG. 4 illustrates a circuit diagram of an example transmitter 410 and receiver circuit 420 that uses multiphase signaling and processing.
- a SIN signal sin( ⁇ n) is transmitted on row 1 via source 424 and a COS signal cos( ⁇ n) on row 2 transmitted concurrently via source 426 .
- Both the SIN and COS can be at the same or different frequencies.
- the multiphase signals should remain orthogonal (e.g., in substantially the same phase relationship) over the integration time (transmit and receive time).
- the received signal represented as 2Asin( ⁇ n+ ⁇ )+2Bcos( ⁇ n+ ⁇ ) in this example can be received via analog front end (AFE) 428 and can be match filtered with the transmitted SIN and COS signal in the digital domain via summing junctions 430 and 434 , respectively.
- AFE analog front end
- output from the summing junction 430 can be represented as ⁇ Acos(2 ⁇ n+ ⁇ )+Acos( ⁇ )+Bsin(2 ⁇ n+ ⁇ )-Bsin( ⁇ )
- output from the other summing junction can be represented as Asin(2 ⁇ n)+Asin( ⁇ )+Bcos(2 ⁇ n+ ⁇ )+Bcos( ⁇ ).
- These signals can be filtered via low pas filters 440 and 444 , respectively to produce output signals Acos( ⁇ ) ⁇ Bsin( ⁇ ) and Bcos( ⁇ )+Asin( ⁇ ), respectively.
- Output from the filters 450 can be analyzed for amplitude and/or phase differences by a location analyzer 450 to determine touch locations between rows or columns of the touch system.
- the signals can be maintained in a given phase relationship with respect to each other (e.g., orthogonal), changes in the signal strength of the SIN indicates a touch on row 1 and the corresponding receiver while any change in COS will give the touch information on row 2 and the receiver of interest.
- information about two touch electrodes can be obtained concurrently. This implies that by scanning in pairs, the touch image can be obtained in half the time.
- more than two rows can be concurrently scanned and analyzed.
- One half the number of receivers can be employed in an example to facilitate scanning the panel twice (e.g., getting half the entire panel information from the first scan and one half from the second scan).
- the total scan time using multiphase stimulation remains substantially the same while the hardware complexity is reduced.
- the receive channel can be built with a higher dynamic range to account for interference. Therefore, sending multiphase signals does not impact the individual receiver design. Thus, a factor of two hardware improvement can be easily obtained using two excitation signals. This can also be easily extended to larger number of concurrent excitations.
- an example method is described with reference to FIG. 5 .
- the method is shown and described as executing serially, but parts of the method could occur in different orders and/or concurrently from that shown and described herein.
- Such method can be executed by various components, such as components configured in an integrated circuit, a processor or a controller.
- FIG. 5 illustrates an example method 500 to determine touch location of a touch system.
- the method 500 includes transmitting excitation signals that are out of phase with respect to each other to a touch system (e.g., via transmitter 110 of FIG. 1 ). At least one of the excitation signals is transmitted to at least one row or column of the touch system and at least one other of the signals is concurrently transmitted to at least one other row or column of the touch system.
- the method 500 includes receiving an output signal from the touch system in response to the excitation signals (e.g., via receiver 150 of FIG. 1 ). The output signal includes a combined response from two or more rows or columns of the touch system excited by the excitation signals.
- the method 500 includes comparing the amplitude or phase of the output signals received from different rows or columns of the touch system to determine a difference in the amplitude or phase of the output signal from the different rows or columns of the touch system to determine the location of the user's touch relative to the rows or columns of the touch system (e.g., via touch location analyzer 180 of FIG. 1 ).
- the method 500 can also include transmitting the excitation signals 90 degrees out of phase with respect to each other and/or at different frequencies with respect to each other.
Abstract
Description
- This relates generally to integrated circuits, and more particularly to estimating a touch location in a touch system.
- A touch system includes interfaces such as touch screens that can include an input device and output device layered on top of an electronic visual display of an information processing system. For example, a user can provide input or control the information processing system through simple or multi-touch gestures by touching the screen with a special stylus and/or one or more fingers. Touch screens are common in devices, such as game consoles, personal computers, tablet computers, electronic voting machines, and smart phones. These interfaces can also be attached to computers or, as terminals, to networks.
- To detect user gestures such as touching via the touch system interface, common technologies include resistive touch screens and capacitive touch screens can be employed. An example capacitive touch screen panel consists of an insulator such as glass, coated with a transparent conductor such as indium tin oxide. As the human body is also an electrical conductor, touching the surface of the screen results in a distortion of the screen's electrostatic field, measurable as a change in capacitance. Different technologies may be used to determine the location of the touch. In some touch systems, mutual or self capacitance can be measured by transmitting a signal on a row/column of the touch screen interface and receiving the signal on a respective column/row. When the touch occurs close to a row/column intersection, the received change in signal strength and/or signal phase changes. This change isolates the touch location.
- In an example, a system includes a receiver to receive output signals from a touch system to detect a user's touch. The output signals are received in response to excitation signals that are generated out of phase with respect to each other and applied to at least two rows or columns of the touch system. A touch location analyzer compares an amplitude of the output signals received from the rows or columns of the touch system, where a ratio of the output signal amplitudes from the rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system.
- In another example, a receiver receives output signals from a touch system to detect a user's touch. The output signals are received in response to at least two out of phase excitation signals applied to at least two rows or columns of the touch system. A touch location analyzer compares the phase of the output signals received from different rows or columns of the touch system. A difference in phase of the output signal amplitudes from the rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system.
- In yet another example, a method includes transmitting excitation signals that are out of phase with respect to each other to a touch system. At least one of the excitation signals is transmitted to at least one row or column of the touch system and at least one other of the excitation signals is concurrently transmitted to at least one other row or column of the touch system. The method includes receiving output signals from the touch system in response to the excitation signals. The output signal includes a combined response from two or more rows or columns of the touch system excited by the excitation signals. The method includes comparing the amplitude or phase of the output signals received from different rows or columns of the touch system to determine a difference in the amplitude or phase of the output signal from the different rows or columns of the touch system to determine the location of the user's touch relative to the rows or columns of the touch system.
-
FIG. 1 is a schematic block diagram of an example system to determine touch location of a touch system. -
FIG. 2 is a circuit diagram of a receiver and transmitter for an example touch system that uses multiphase signaling and processing. -
FIG. 3 is a circuit diagram of an example touch system that can be excited and analyzed via multiphase signaling to determine touch location. -
FIG. 4 is a circuit diagram of an example transmitter and receiver circuit that uses multiphase signaling and processing to determine touch location. -
FIG. 5 is a flow diagram of an example method to determine touch location of a touch system. - In example embodiments, received signals from a touch system are analyzed with respect to signal amplitude and/or phase to determine a location of a user's touch relative to the rows or columns of the touch system. A receiver receives output signals (or signal) from the touch system to detect the user's touch. The output signals are received in response to excitation signals that are generated out of phase with respect to each other and applied to at least two rows or columns of the touch system. In some examples, out of phase excitation signals can be applied concurrently to the rows or columns of the touch system to decrease the amount of scan time it takes to receive a response to the excitation signals. Also, by concurrently analyzing multiple touch locations in response to the out of phase excitation signals, receiving hardware to determine the user's touch can be simplified. A touch location analyzer compares an amplitude of the output signals received from different rows or columns of the touch system. A ratio of the output signal amplitudes from the different rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system. In another example, received signal phases from different rows or columns of the touch system are analyzed to determine the location of the user's touch.
- By analyzing the respective amplitudes and/or phases received in response to a user's touch of the touch system, precise location of the touch can be determined which includes determining touch locations between rows and/or columns of the touch system. For example, if a stylus (or finger) is placed at a touch location that is directly over a row/column detection point, a maximum signal amplitude may be received for that point. If the stylus is offset to touch/affect more than one row or column detection point of the touch system, a combination of signal amplitudes or phases can be analyzed to detect locations between rows or columns. Thus, if one row yields a signal at 70% of maximum, and another row provides a signal that is 30% of maximum, it can be determined that the stylus is offset from the center of one row in the direction toward about 30% of the other row.
- The touch system can be excited by a transmitter that transmits excitation signals that are out of phase with respect to each other (e.g., a sine wave generated as one excitation signal and a cosine wave generated as another excitation signal). At least one of the of excitation signals is transmitted to at least one row or column of a touch system and at least one other of the excitation signals is concurrently transmitted to at least one other row or column of the touch system. An output signal having a combination of signals from each of the excitation signals is received by a receiver in response to the excitation signals transmitted to the touch system. Receiver circuits extrapolate the row or column information from the output signal based on the phase of the excitation signals. For example, in a two phase excitation system, at least two receiver circuits include a summing junction to extrapolate signal phases from the output signal to determine which of at least two rows or columns was touched.
-
FIG. 1 illustrates anexample system 100 to touch location of a touch system. Thesystem 100 includes atransmitter 110 to transmitexcitation signals 114. At least one of theexcitation signals 114 can be transmitted to at least one row or column of atouch system 120 and at least one other of the excitation signals can be concurrently transmitted to at least one other row or column of the touch system. In some examples, individual excitation can be provided where one row or column is excited and in a subsequent scanning sequence another row or column of thetouch system 120. Thetransmitter 110 generates at least one of theexcitation signals 114 at a given phase to one row or column of thetouch system 120 and generates the other of the excitation signals at a different phase from the given phase to the other row or column of the touch system. For example, oneexcitation signal 114 may be generated as a sin wave and another excitation signal generated as a cosine wave. As described hereinbelow, other phase relationships are possible. - The
transmitter 110 includes at least one alternating current (AC)source 130 to generate theexcitation signals 114 to thetouch system 120 where each of the excitation signals in one example are transmitted out of phase with respect to each other excitation signal. At least two of theexcitation signals 114 can be generated at the same frequency or at different frequencies with respect to each other via theAC source 130. Different frequencies can be employed for theexcitation signals 114 so long as they remain in their given phase relationship (e.g., orthogonal) over the integration time which includes both the time it takes to transmit and receive signals in response to theexcitation signals 114. - In one example, at least two of the
excitation signals 114 can be transmitted to at least two rows or columns of thetouch system 120 where the excitation signals are at least 90 degrees out of phase with respect to each other when transmitted to the respective rows or columns. In other examples, more than twoexcitation signals 114 can be transmitted to the touch system to further reduce scan time of the touch system. As used herein, the term “scan time” refers to the amount of time it takes to excite each respective row or column of thetouch system 120. In single phase excitation systems, each row or column had to be excited individually to detect the presence of a touch shown asuser input 134. In the multiphase system described herein, multiple rows or columns can be analyzed concurrently to reduce the scan time in half in a two phase excitation system (or reduced more if more than two excitation signals utilized). - The
touch system 120 can be a mutual capacitance touch system (see e.g.,FIG. 3 ) having at least two rows and columns that receive the excitation signals 114 from thetransmitter 110 where the touch system generates an output signal 140 (or signals) based on the excitation signals. Areceiver 150 receives theoutput signal 140 from thetouch system 120. Thereceiver 150 includes at least tworeceiver circuits 160 to process theoutput signal 140 from thetouch system 120 and to determine if or where a user has touched the touch system. As used herein, the term “circuit” can include a collection of active and/or passive elements that perform a circuit function, such as an analog circuit or control circuit. Additionally or alternatively, for example, the term “circuit” can include an integrated circuit (IC) where all and/or some of the circuit elements are fabricated on a common substrate (e.g., semiconductor substrate). - Each of the
receiver circuits 160 can include a summing junction (see e.g.,FIG. 4 ) to extrapolatesignal phases 170 from theoutput signal 140 to determine which of the rows or columns was touched from thetouch system 120. At one of the summing junctions of thereceiver circuits 160, theoutput signal 140 is summed with the excitation signal at the given phase to extrapolate the row or column excited in response to the given phase. At the other of the summing junctions of thereceiver circuits 160, theoutput signal 140 is summed with the excitation signal at the different phase to extrapolate the row or column excited in response to the different phase. The output of each of the summing junctions can be filtered via a low pass filter to facilitate extrapolating the row or column that was touched from the output of each of the summing junctions in thereceiver circuit 160. - By providing multiphase signaling and analysis as described herein to reduce scan time of the touch system, a portion of the
touch system 120 can be excited by thetransmitter 110 during one scanning sequence and analyzed by thereceiver 150 based on the scanning of the portion. At least one other portion of thetouch system 120 can be excited by thetransmitter 110 during another scanning sequence and analyzed by the receiver based on the scanning of the at least one other portion. In this manner of multiphase signaling and processing, hardware complexity can be reduced because multiple rows or columns can be scanned using fewer connection nodes to thetouch system 120 to determine a touch to the system (e.g., in a two phase excitation system, half of the row or column connections from conventional systems can be reduced). - A
touch location analyzer 180 compares an amplitude of the output signals received from different rows or columns of the touch system. A ratio of the output signal amplitudes from the different rows or columns of the touch system is utilized to determine the location of the user's touch relative to the rows or columns of the touch system. For example, if the amplitude received from one row was at 20% peak and the amplitude received from another row was at 80% peak, touch location can be calculated base on the ratio of 20/80, such that 80 percent of the users touch force is affecting one row and 20% of the user's touch force is affecting the other row. As used herein, peak signal amplitude refers to the maximum signal received when no touch force is applied. If it is known that 10 millimeters separate the rows for example, the touch location is approximately 8 millimeters away from one row (the 20% peak row) and about two millimeters away from the other row (e.g., 80% peak row). - In another example, received signal phases from different rows or columns of the touch system are analyzed to determine the location of the user's touch. For example, in a no-touch force situation, received output signals may be 90 degrees out of phase with respect to one another. When a user touches the
touch system 120, the signal phases of theoutput signal 140 can change such that it can be determined where in between rows or columns the touch has occurred. A calibration table, described below, can be provided where signal amplitudes and phases are analyzed between maximum touch force and minimum touch force to determine the change in location. The table can include a range of amplitude or phase differences corresponding to how close or near a touch has occurred to a given row or column. By analyzing the respective amplitudes and/or phases received in response to a user's touch of the touch system, precise location of the touch can be determined which includes determining touch locations between rows and/or columns of the touch system. For example, if a stylus (or finger) is placed at a touch location that is directly over a row/column detection point, a maximum signal amplitude may be received for that point. If the stylus is offset to touch/affect more than one row or column detection point of the touch system, a combination of signal amplitudes or phases can be analyzed to detect locations between rows or columns. - In a signal amplitude example, if one row yields a signal amplitude at 50% of maximum, and another row provides a signal that is 50% of maximum, it can be determined from this ratio that the stylus is offset approximately half way between the two rows. A similar analysis can be conducted by the
touch location analyzer 180 by comparing signal amplitudes received from respective columns to determine touch locations between columns. In a signal phase example for determining touch location, if a touch location is directly over a row/or column detection point, a given phase may be determined between the respective row or column. If the stylus (or finger) is moved between rows or columns a different phase relationship can be determined. A calibration table in thetouch location analyzer 180 can be used to determine a range of amplitudes or phases to be encountered at differing distances between rows or columns of thetouch system 120. For example, if a stylus is 100% over a given row of thetouch system 120, a phase of 90 degrees may be detected between the two rows. If the stylus is between rows or columns, a phase other than 90 degrees may be detected where this difference in phase from 90 degrees determines the distance between rows or columns. -
FIG. 2 illustrates anexample circuit 200 of areceiver 210 and atransmitter 220 for a touch system where multiphase excitation and processing is employed. Thetransmitter 220 provides multiple out of phase excitation signals 234 to atouch panel 240. Thetransmitter 220 can provide row or column excitation to thetouch panel 240 to detect a user's touch where more than one row or column are excited concurrently via the excitation signals 234. In this example, acapacitance touch panel 240 is illustrated. In a touch system, mutual or self capacitance can be measured by transmitting the excitation signals 234 to selected rows/columns of thepanel 240. Thereceiver 210 receives asignal 244 in response to the excitation signals 234 applied on the columns/rows of thetouch panel 240. When a touch occurs close to a row/column intersection, the received change in signal strength and/or phase change can be detected by thereceiver 210. This change isolates the touch location on thetouch panel 240. - The
transmitter 220 can include at least one numerically controlled oscillator (NCO) 250 which drives a digital to analog converter (DAC) 254, which in turn drives anoutput amplifier 258 to provide thesignals 234. Thereceiver 210 can include an analogfront end 259 that includes an input stage oramplifier 260 which drives an analog to digital converter (ADC) 262. Output from theADC 262 andNCO 264 can be multiplied at 266 which is then summed at 268. As described hereinbelow with reference toFIG. 4 , thereceiver 210 can include summing junctions and filters (e.g., before or after the sense amplifier 260) to extrapolate row/column information from thesignal 244 as described herein. -
FIG. 3 illustrates an example of atouch system 300 that can be excited and analyzed via multiphase signaling. In thetouch system 300, a known signal is transmitted via sources which is coupled through atouch panel 320 and then received by the receiver viasense inputs 330. The change in the gain/phase of the received signal from one or more of thesense inputs 330 indicates the presence or absence of a touch. In conventional touch systems, each transmitter (row/drive line) is stimulated, usually with a sinusoidal signal at a known frequency for a certain period of time. The received signal is concurrently measured by a number of receive channels viainputs 330. The change in capacitance on any receive channel indicates the presence of a touch close to the intersection of the transmit channel (row) and that receive channel (column). In such systems, the transmit channels are then scanned row by row to obtain the touch image. - To reduce the area of the touch controller circuit in conventional single excitation systems, one can reduce the number of receive and/or transmit channels. However this increases the scan time. The scan time increases by the same factor as the hardware reduction. For example, if the hardware is reduced by a factor of 2, the scan time increases by a
factor 2 to obtain the same performance level. However, an increase in scan time decreases the responsiveness of the touch screen controller. In the system and methods described herein, multiphase signaling is provided where two or more rows/columns of thetouch panel 320 are excited concurrently effectively reducing the scan time. When the scan time is reduced, hardware complexity can thereby also be reduced. As shown, alocation analyzer 334 can be provided to detect a location for a user's touch via stylus or fingering. Thelocation analyzer 334 can include an amplitude comparator 340 to compare signal amplitudes between rows or columns to determine a signal amplitude ratio which determines touch distances between rows and/or columns. Aphase comparator 350 can also be provided to determine touch distances between rows and/or columns based on differences in detected signal phases received. -
FIG. 4 illustrates a circuit diagram of anexample transmitter 410 andreceiver circuit 420 that uses multiphase signaling and processing. In this example, a SIN signal sin(ωn) is transmitted onrow 1 viasource 424 and a COS signal cos(ωn) onrow 2 transmitted concurrently viasource 426. Both the SIN and COS can be at the same or different frequencies. When choosing different frequencies, the multiphase signals should remain orthogonal (e.g., in substantially the same phase relationship) over the integration time (transmit and receive time). - At the
receiver circuit 420, the received signal represented as 2Asin(ωn+φ)+2Bcos(ωn+θ) in this example, can be received via analog front end (AFE) 428 and can be match filtered with the transmitted SIN and COS signal in the digital domain via summingjunctions junction 430 can be represented as −Acos(2ωn+φ)+Acos(φ)+Bsin(2ωn+θ)-Bsin(θ), and output from the other summing junction can be represented as Asin(2ωn)+Asin(φ)+Bcos(2ωn+θ)+Bcos(θ). These signals can be filtered via low pas filters 440 and 444, respectively to produce output signals Acos(φ)−Bsin(θ) and Bcos(θ)+Asin(φ), respectively. Output from thefilters 450 can be analyzed for amplitude and/or phase differences by alocation analyzer 450 to determine touch locations between rows or columns of the touch system. - Because the signals can be maintained in a given phase relationship with respect to each other (e.g., orthogonal), changes in the signal strength of the SIN indicates a touch on
row 1 and the corresponding receiver while any change in COS will give the touch information on row2 and the receiver of interest. Thus, information about two touch electrodes can be obtained concurrently. This implies that by scanning in pairs, the touch image can be obtained in half the time. As described hereinabove, more than two rows can be concurrently scanned and analyzed. One half the number of receivers can be employed in an example to facilitate scanning the panel twice (e.g., getting half the entire panel information from the first scan and one half from the second scan). Thus, the total scan time using multiphase stimulation remains substantially the same while the hardware complexity is reduced. In some example, the receive channel can be built with a higher dynamic range to account for interference. Therefore, sending multiphase signals does not impact the individual receiver design. Thus, a factor of two hardware improvement can be easily obtained using two excitation signals. This can also be easily extended to larger number of concurrent excitations. - In view of the structural and functional features described hereinabove, an example method is described with reference to
FIG. 5 . For clarity, the method is shown and described as executing serially, but parts of the method could occur in different orders and/or concurrently from that shown and described herein. Such method can be executed by various components, such as components configured in an integrated circuit, a processor or a controller. -
FIG. 5 illustrates anexample method 500 to determine touch location of a touch system. At 510, themethod 500 includes transmitting excitation signals that are out of phase with respect to each other to a touch system (e.g., viatransmitter 110 ofFIG. 1 ). At least one of the excitation signals is transmitted to at least one row or column of the touch system and at least one other of the signals is concurrently transmitted to at least one other row or column of the touch system. At 520, themethod 500 includes receiving an output signal from the touch system in response to the excitation signals (e.g., viareceiver 150 ofFIG. 1 ). The output signal includes a combined response from two or more rows or columns of the touch system excited by the excitation signals. At 530, themethod 500 includes comparing the amplitude or phase of the output signals received from different rows or columns of the touch system to determine a difference in the amplitude or phase of the output signal from the different rows or columns of the touch system to determine the location of the user's touch relative to the rows or columns of the touch system (e.g., viatouch location analyzer 180 ofFIG. 1 ). Themethod 500 can also include transmitting the excitation signals 90 degrees out of phase with respect to each other and/or at different frequencies with respect to each other. - Modifications are possible in the described embodiments, and other embodiments are possible, within the scope of the claims.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/843,661 US20190187828A1 (en) | 2017-12-15 | 2017-12-15 | Location detection for a touch system |
PCT/US2018/065224 WO2019118611A1 (en) | 2017-12-15 | 2018-12-12 | Location detection for a touch system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/843,661 US20190187828A1 (en) | 2017-12-15 | 2017-12-15 | Location detection for a touch system |
Publications (1)
Publication Number | Publication Date |
---|---|
US20190187828A1 true US20190187828A1 (en) | 2019-06-20 |
Family
ID=66816004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/843,661 Abandoned US20190187828A1 (en) | 2017-12-15 | 2017-12-15 | Location detection for a touch system |
Country Status (2)
Country | Link |
---|---|
US (1) | US20190187828A1 (en) |
WO (1) | WO2019118611A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023091238A1 (en) * | 2021-11-19 | 2023-05-25 | Alps Alpine Co., Ltd. | Human body sensor system using signal phase shift |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5920309A (en) * | 1996-01-04 | 1999-07-06 | Logitech, Inc. | Touch sensing method and apparatus |
US20100060589A1 (en) * | 2008-09-10 | 2010-03-11 | Thomas James Wilson | Advanced Receive Channel Architecture |
US20110012863A1 (en) * | 2009-07-15 | 2011-01-20 | Kazuyuki Kobayashi | Signal processing circuit for electrostatic capacity type touch sensor |
US20110031042A1 (en) * | 2009-08-05 | 2011-02-10 | Hung-Wei Wu | Touch detecting device and method thereof |
US20120056841A1 (en) * | 2010-09-02 | 2012-03-08 | Texas Instruments Incorporated | Touch-sensitive interface and method using orthogonal signaling |
US20120229421A1 (en) * | 2008-10-30 | 2012-09-13 | Samsung Electronics Co., Ltd. | Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller |
US20130021294A1 (en) * | 2011-04-19 | 2013-01-24 | Andriy Maharyta | Usage of weighting matrices in multi-phase scanning modes |
US20130162585A1 (en) * | 2011-12-22 | 2013-06-27 | Synaptics Incorporated | Systems and methods for determining user input using simultaneous transmission from multiple electrodes |
US8493331B2 (en) * | 2007-06-13 | 2013-07-23 | Apple Inc. | Touch detection using multiple simultaneous frequencies |
US20130300690A1 (en) * | 2012-04-25 | 2013-11-14 | Silicon Works Co., Ltd. | Control circuit of touch screen and noise removing method |
US20140204053A1 (en) * | 2013-01-22 | 2014-07-24 | Pixart Imaging Inc. | Concurrent driving capacitive touch sensing device and transmission system |
US20140240278A1 (en) * | 2013-02-25 | 2014-08-28 | Ki-Duk Kim | Operational amplifier and touch sensing apparatus including the same |
US20140375595A1 (en) * | 2013-06-25 | 2014-12-25 | Himax Technologies Limited | Touch system |
US20150130731A1 (en) * | 2013-11-08 | 2015-05-14 | Egalax_Empia Technology Inc. | Processing Device and Processing Method |
US20150138145A1 (en) * | 2013-11-20 | 2015-05-21 | Samsung Electronics Co., Ltd. | Touch screen controller to generate single-ended touch signal, and touch screen system and display apparatus including the same |
US20150153868A1 (en) * | 2013-12-03 | 2015-06-04 | Pixart Imaging Inc. | Capacitive touch sensing system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3394187B2 (en) * | 1997-08-08 | 2003-04-07 | シャープ株式会社 | Coordinate input device and display integrated type coordinate input device |
US8493355B2 (en) * | 2008-05-14 | 2013-07-23 | 3M Innovative Properties Company | Systems and methods for assessing locations of multiple touch inputs |
US9753586B2 (en) * | 2009-10-08 | 2017-09-05 | 3M Innovative Properties Company | Multi-touch touch device with multiple drive frequencies and maximum likelihood estimation |
US8773386B2 (en) * | 2012-08-09 | 2014-07-08 | Cypress Semiconductor Corporation | Methods and apparatus to scan a targeted portion of an input device to detect a presence |
US20160370912A1 (en) * | 2015-06-22 | 2016-12-22 | Microsoft Technology Licensing, Llc | Multiple matrix differential touch sense |
-
2017
- 2017-12-15 US US15/843,661 patent/US20190187828A1/en not_active Abandoned
-
2018
- 2018-12-12 WO PCT/US2018/065224 patent/WO2019118611A1/en active Application Filing
Patent Citations (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5920309A (en) * | 1996-01-04 | 1999-07-06 | Logitech, Inc. | Touch sensing method and apparatus |
US8493331B2 (en) * | 2007-06-13 | 2013-07-23 | Apple Inc. | Touch detection using multiple simultaneous frequencies |
US20100060589A1 (en) * | 2008-09-10 | 2010-03-11 | Thomas James Wilson | Advanced Receive Channel Architecture |
US20120229421A1 (en) * | 2008-10-30 | 2012-09-13 | Samsung Electronics Co., Ltd. | Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller |
US10042482B2 (en) * | 2008-10-30 | 2018-08-07 | Samsung Electronics Co., Ltd. | Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller |
US20110012863A1 (en) * | 2009-07-15 | 2011-01-20 | Kazuyuki Kobayashi | Signal processing circuit for electrostatic capacity type touch sensor |
US8878812B2 (en) * | 2009-07-15 | 2014-11-04 | Semiconductor Components Industries, Llc | Signal processing circuit for electrostatic capacity type touch sensor |
US20110031042A1 (en) * | 2009-08-05 | 2011-02-10 | Hung-Wei Wu | Touch detecting device and method thereof |
US8514189B2 (en) * | 2009-08-05 | 2013-08-20 | Silicon Integrated Systems Corp. | Touch detecting device and method thereof |
US8605054B2 (en) * | 2010-09-02 | 2013-12-10 | Texas Instruments Incorporated | Touch-sensitive interface and method using orthogonal signaling |
US20120056841A1 (en) * | 2010-09-02 | 2012-03-08 | Texas Instruments Incorporated | Touch-sensitive interface and method using orthogonal signaling |
US8729911B2 (en) * | 2011-04-19 | 2014-05-20 | Cypress Semiconductor Corporation | Usage of weighting matrices in multi-phase scanning modes |
US20130021294A1 (en) * | 2011-04-19 | 2013-01-24 | Andriy Maharyta | Usage of weighting matrices in multi-phase scanning modes |
US20130162585A1 (en) * | 2011-12-22 | 2013-06-27 | Synaptics Incorporated | Systems and methods for determining user input using simultaneous transmission from multiple electrodes |
US20130300690A1 (en) * | 2012-04-25 | 2013-11-14 | Silicon Works Co., Ltd. | Control circuit of touch screen and noise removing method |
US20140204053A1 (en) * | 2013-01-22 | 2014-07-24 | Pixart Imaging Inc. | Concurrent driving capacitive touch sensing device and transmission system |
US20140240278A1 (en) * | 2013-02-25 | 2014-08-28 | Ki-Duk Kim | Operational amplifier and touch sensing apparatus including the same |
US20140375595A1 (en) * | 2013-06-25 | 2014-12-25 | Himax Technologies Limited | Touch system |
US9007341B2 (en) * | 2013-06-25 | 2015-04-14 | Himax Technologies Limited | Touch system |
US20150130731A1 (en) * | 2013-11-08 | 2015-05-14 | Egalax_Empia Technology Inc. | Processing Device and Processing Method |
US9569017B2 (en) * | 2013-11-08 | 2017-02-14 | Egalax_Empia Technology Inc. | Processing device and processing method |
US20150138145A1 (en) * | 2013-11-20 | 2015-05-21 | Samsung Electronics Co., Ltd. | Touch screen controller to generate single-ended touch signal, and touch screen system and display apparatus including the same |
US20150153868A1 (en) * | 2013-12-03 | 2015-06-04 | Pixart Imaging Inc. | Capacitive touch sensing system |
US9886142B2 (en) * | 2013-12-03 | 2018-02-06 | Pixart Imaging Inc. | Capacitive touch sensing system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023091238A1 (en) * | 2021-11-19 | 2023-05-25 | Alps Alpine Co., Ltd. | Human body sensor system using signal phase shift |
Also Published As
Publication number | Publication date |
---|---|
WO2019118611A1 (en) | 2019-06-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5301696B2 (en) | Multiple simultaneous frequency detection | |
US10241597B2 (en) | Active stylus pen and touch sensing system including the same | |
US9645690B1 (en) | Method and apparatus to improve noise immunity of a touch sense array | |
AU2013256581B2 (en) | Capacitance touch near field-far field switching | |
US9201547B2 (en) | Wide dynamic range capacitive sensing | |
US7876311B2 (en) | Detection of low noise frequencies for multiple frequency sensor panel stimulation | |
US20160231854A1 (en) | Orthogonal frequency division scanning method for sensors | |
JP6096427B2 (en) | Multi-touch touch-sensitive device with multi-frequency capacitance detection | |
US20190187828A1 (en) | Location detection for a touch system | |
WO2019118478A1 (en) | Touch force detection for a touch system | |
US20180188844A1 (en) | Multiphase signaling for scan time reduction for a touch system | |
US20150029146A1 (en) | Capacitive touchscreen device with multi-touchscreens | |
US9453862B2 (en) | Multitouch tactile device with multi frequency and barycentric capacitive detection | |
US11934612B1 (en) | Multi-frequency simultaneous absolute capacitance touch sensing | |
AU2015258278B2 (en) | Channel aggregation for optimal stylus detection |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TEXAS INSTRUMENTS INCORPORATED, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOSUR, SRINATH;KHANDELWAL, ASHISH;SIGNING DATES FROM 20171206 TO 20171207;REEL/FRAME:044408/0611 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STCV | Information on status: appeal procedure |
Free format text: NOTICE OF APPEAL FILED |
|
STCV | Information on status: appeal procedure |
Free format text: NOTICE OF APPEAL FILED |
|
STCV | Information on status: appeal procedure |
Free format text: APPEAL BRIEF (OR SUPPLEMENTAL BRIEF) ENTERED AND FORWARDED TO EXAMINER |
|
STCV | Information on status: appeal procedure |
Free format text: EXAMINER'S ANSWER TO APPEAL BRIEF MAILED |
|
STCV | Information on status: appeal procedure |
Free format text: ON APPEAL -- AWAITING DECISION BY THE BOARD OF APPEALS |
|
STCV | Information on status: appeal procedure |
Free format text: BOARD OF APPEALS DECISION RENDERED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |